I've started a cycle 4 weeks ago of 110mg of Test Prop and 100mg Masteron EOD and have had great gains (9 lbs) WOW. I love this stuff. The only thing is, this is the first time I have ever had the side effect of my left nipple being tender. After reading some posts, I have come to the conclusion, this is the first step of gyno. After reading that, I wanted to stop all together. But after calming down, I now know to get some Nolvadex. I've used Test Prop in the past and have never had this side effect. Do you think it can be the Masteron? Not that you can die from Gyno but I never thought I would have this issue. Just thought I was superman! Must be the AAS.